On April 14, 2022, Southern Copper Corporation announced that it has received a shareholder proposal from The United Steelworkers, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union, asking the Company to take the steps necessary to adopt a policy to require that the Chair of the board, whenever possible, be an independent member of the board. In addition, the Company urged the shareholders to vote against the shareholders proposal at the annual meeting of shareholders scheduled to be held on May 27, 2022.